Regulating device for arc lamps



F. MEYER 1,721,081

REGULATING DEVICE FOR A Filed June 21,1928

July 16, 1929.

RG LAMPS'y am m1rrr9m5 h c m6 mii Inventor:

Patented July 16, 1929.

UNIT'EDSTATES FRANZ MEYER, 0F GERMANY, ASSIGNOR TO FIRM GERMANY.

CARL zErss, or JENA',

BGULATING DEVICE Fon ARC LAMPS.

Application led June 21, 1928, Serial No. 287,231, and in Germany .Tune 3, 1927.

The present invention relates to a regulat-ing device for are lamps in which, for producing the regulating motion', one uses a motor which continuously runs in the same direction.

According to the invention a concerted action is brought about by having the motor actuate a shaft, to feed the carbons, (feed shaft), by way of either one of two gears disposed between the motor and the carbons, one a reversing gear and one a disengaging gear the latter rotating the feed shaft at lower speed than the reversing gear, and in addition a number of magnets are provided, two of whicl1,-one being connected with the are in series, and one parallel to the arc,- actuate the reversing gear, while the remain ing ones-which have a greater sensibility than those named in first place-serve for coupling the motor to the feed shaft by way of the second gear.

In this manner one Aattains a comparatively simplified regulating device by which the cai-bons are moved.- lso for the purpose of ignition,-and in fact are moved quite rapidly. Frequently it will suffice to develop the second gear rotating the feed shaft at lower speed in a manner that it only rotates the feed shaft in one direction, whereby the arrangement would be made in a way as to effect the forward motion of the earbons through the second gear to take place at' the moment when the arc-voltage becomes too high, thus compensating the consumption of the earbons. Any excessive intensif)7 of eurrent would then have to be compensated through the motor by way of the reversing gear alone. i

If in the described arrangement the motor is coupled to the feed shaft b v way of the reversing gear referred to` it will be coupled simultaneouslyat least when rotating in the one directionto the second gear rotating the feed Shaft at lower speed. In order to attain thereby the greatest possible simplicity ofconstruction it is suitable to develop the aforesaid disengaging gear into a ratchet gearing, whereupon it is possibleL to support both gears on one and the same shaft, i. e., either on the feed shaft itself or on a shaft permanently coupled to the feed shaft, since,

in driving thisv shaft by' means of the reversing gear, which is invariably effected in the same direction in which the feed-wheel of the ratchet gearing is driven, the wheel can glide away under .the pawl.

It will he suitable if the ratchet gear be made double acting, not only to regulate thecarbon feeding-process, but also for the purpose of contributing towards regulating the space between the earbons whenever the intcnsity of current'exceeds the normal.

The annexed drawing shows a construc. tional example of a regulating device with double acting ratchet gear according to the present invent-ion. Fig. 1 of the drawing represents la. view partly drawn in section and partly showing the side elevation, while Fig.

2 gives a plan view of the device. Fig. 3 epresents a part section ofthe line 3-3 of 70 The device shown has a base plate a upon which is supported al bearing bracket consisting of parts b1 and b. Withinthe bracket is supported, in vertical position, a shaft c, which is permanently coupled to the carbon feed shaft. Two shafts e1 and e2 are supported` in a. horizontal position, in part b1 of the bearing bracket and'in two additional brackets d1 and d2. One of these two shafts, 80 e1. is coupled to motor f by a pair of bevel gears e3 and et, while the other shaft, e, is coupled to shaft e1 through two pairs of face gears e5, eand e", es. A friction bevel gear 71 is supported,'-capable of displace- 85 ment in an axial direction,-on shaft el by means of slot and key, and a friction bevel gear (12 in the same manner on shaft e. These two bevel gears together with a bevel gear (13 fixed to the lower end of shaft c, form a 90 reversing gcar. Shaft c furthermore supports a feed wheel k, which stands opposite to a duplex pawl 71.1. The pawl, on a ball hearing 71.2, is 'Capable of rotating about a. holt 71.3 fixed to an arm h4. which is rotatable in sliding friction about shaft c (of. Fig. 3).

Pawl kris providedwith an arm /t havin i .a ring-shaped end h.which,encircles sha t i. Over the lower arm of this lever a sleeve z" is slipped capable of sliding back and forth on the lever; Sleeve' z" is fastened to cam 1o ring'i" of an eccentric z" supported by the shaft of the motor. The device includes two pairs of electro-magnets, i. e., one air y", j fixed to base plate a, and one pair 1,162, the magnets of which are mounted upon two supportal:a and c of part b1 'of the bearing bracket. The armatures of both' magnets 7'1 and i2 are constructed as duplex levers j and y" which are rotatably supported at part b1, one of which, is, being pivoted to bevel gear g, and the other, j, to bevel gear g1.

Tension spring l1 is connected to the free endV of lever j, and another tension spring, Z2, to the free end of lever j. Both springs are fastened to a nose Z3 of base platea. So

long as magnets jl and i2 are .not excited,

springs Z1 and Z will draw the levers y" and 1" in a position, as shown on drawing. 4where bevel gears 4g1 and gz do not engage wheel g. The armatures of both magnets k1 and la consist of two duplex levers m1 and m rotatably supported on part b', the first one, m1, rotatable about a Din m, and the latter, m, about a pin m. The levers are kept in the position shown on drawing by tension springs 'mfi andm" so long as magnets k1 and Y 7:2 are not excited. In this position 'the free ends of the levers lie next to the ring-shaped end h of lever 7L thus' preventing .this lever from backing out sideways when pawl h? moves to and fro.

Of the magnets lc1 and iz are connected parallel to the arc of the' arc lamp. while 7:2 and 71 are connected in series with the arc. Magnets k1 and k2 are more sensitive to minor fluctuations in the current flowing through their windings than are magnets 7" and i2. It follows, therefore, that itfis the first named magnets which areotaking care of regulating the iuctuations inthe arc-voltage and of the intensity of current andthe consumption of the carbons for instance, when thelamp is op-' i erated, while the primary task for magnets 7'1 and 7'* is, to begin operating at the ignition of the lamp which at times also b'ecomes necessary if the arc is unintentionally broken during the peration of the lamp.

The device shown is operated in the following manner. When switching on the circuit of the arc lampwhile carbons are in contact with one another, the current Sthen liowing through the lampis too strong to begin with. Asa result magnets jl and k2 will attract their respective armatures, whereby armature y" presses bevel gear g2 against the wheel g, in

a this way-coupling the shaft of the motor ft as to separate the car shaft c which thereby is made to rotate at comparatively high s eed in such a manner bons from one another. When the armature m2 is attracted by magnet lc, its end, as shown at the left of the drawing, is lifted abovethe ring-shaped end k of'lever h5. So long as the armature m2 was not attracted it was not possible for pawl IL1,-which is being moved to and fro through the motor f by Wa of the eccentric disc i and connecting ro z'-, tovengage lthe feed Wheel h, as the lever h", forming a unit with thepawl, could not back out sideways, and, as the pawl with the arm z invariably had to rotate about shaft c. Now, however, with the armature m2 standing higher than the lever la, the pawl h1 will rotate in ball bearing It, when the connecting rod moves to the left,- since lever It, as shown in Fig. 2, vcan back out to the right-thus enabling the pawl to engage feed wheel L. On the connecting rod z' moving farther to the left, the pawl h1 would revolve the feed wheel zlby continuing to rotate with the arm L round shaft c if the feed wheel were not already revolved by the bevel gear g3, and, indeed, more quickly than could be effected by the pawl. In this case the feed wheel-Ah glides away under awl- 'h -If in this way the carbons have. een

'separated from one another to a certain distance, the magnet jl, due to its lesser sensibility, releases its armature for the time being thus disengaging the coupling of the motor to shaft c by way of the reversing gear. The

awl k1 then begins to workand b degrees eeps on transporting the shaft c still a little farther, in the same direction as wheel g2, until magnet k2 releases its armature, m2, also which latter in turn again prevents the pawl from engaging the feed wheel. If the carbons be too far y apart from each other when 'switching on the current, the magnets cl and jz will attract their respective armatures, and the operation proceeds in a similar manner as before, only the shaft c, being driven in the opposite direction than the previous one.

l The -regulating motions during the operation of the lamp enerally are initiated only by magnets k1 angle2 due to the greater sensi- ,bility of these magnets. Thereupon, it is solely the ratchet gearing which attends to the rotation of shaft c.

I claim:

1. In a regulatin device for aro lamps, the combination'of a shaft intended to shift the carbons, a motor running continuously in the same direction, a reversing gear and a dis; engaging gear, both gears coacting with the motor and the aforesaidshaft and the second gear being-adapted to rotate the shaft at lower speed than the reversing gear; a pair of electromagnets, one of them connected in series with the -arc of the lamp, and another conf nected parallel to the arc, both magnets serving to actuate the reversing gear, another claim 1, the aforesaid second gear being a pair of magnets, one in series and the other in ratchet gear. l0 parallel with the arc, having a greater sensi- 3. In a regulatin device according. to bility than the two aforementioned ones, and lclaim 1, the aforesaid second gear being a 5 serving to couple the aforesaid shaft to the ratchet` gear suitable. for rotating the aforemotor with the aid of the second gear resaid shaft in'both directions. ferred to. A 'l- 2. In a regulating device according to FRANZ MEYER. 

